The most comprehensive collection of HP calculators on the Internet with information about their history, technical details and more.
A petition to bring back the HP-15C. While waiting for the success of the petition, you may use the Simulator...
A collection of HP and other companies programmable calculators.
Here you can also find
my very first calculator
On the official HP calculator site, you will find all currently available calculator models.
As of January 2006, one model from the 10C series is still in production: The HP-12C, the financial model. It has now reached a production time of 25 years!
Home of the Tool Command Language and the Tool Kit.
If you do not have already installed Tcl/Tk on your system or if you do not have version 8.4.x, you may download it from here. You can download either the source code or pre-compiled binaries for common operating systems.
The "URW Fonts" can be downloaded from the Gimp ftp server.
Comments on the Simulator, error reports or example programs are welcome.